Search for new physics in charm processes

TL;DR

This paper investigates the potential of charm meson decays as a new avenue for discovering physics beyond the Standard Model, focusing on leptoquark contributions and reconciling experimental and theoretical results.

Contribution

It systematically evaluates the role of leptoquarks in rare charm decays, incorporating constraints from light meson decays, which is a novel approach.

Findings

Leptoquarks could significantly influence charm decay processes.

Constraints from light meson decays limit leptoquark parameter space.

Reevaluation of charm processes as probes for new physics.

Abstract

Charm procceses are usually not considered to be favorable candidates in the search for new physics. Recent disagreement between experimental and lattice QCD results on the D_s decay constant has motivated us to systematically reinvestigate role of leptoquarks in rare charm meson decays. We include constrains coming from the light meson decays.